Hi,
I'm unable to change my talents in the waiting area. I get an error message from one of my addons... think it picks one at random. I have had it say spamthrottle a few times and it has also said other addons I can't remember which ones. I get an option to ignore or disable. I've always clicked ignore because I need the addons in question to play apart from spamthrottle. Any ideas on what is causing this?

Simple, update all your addons and go through and remove any that really aren't necessary. If that doesn't work link the error message as it usually has some info on which addons are causing all your other addons to play up, as it only takes one out of date addon or bugged addon to mess everything up. If we find the addon playing up you can check other forums to see if its a common problem and can help addon devs to fix bug by linking error message. ^~^

You can also turn off those error messages that come up on your screen if you don't want them bugging you every arena.
Found /reload would get my talents system to work after receiving disable/ignore msg. worth a try.